Presentation Zen Design: Simple Design Principles and Techniques to Enhance Your Presentations is a great follow up to Garr Reyonlds’ classic Presentation Zen. The first book deals primarily with the underlying principles for presenting data and information. Presentation Zen Design is also very good, but it focuses more of the nuts and bolts of designing PowerPoint slides.
At its heart, it is really a very quick summary of the standard rules of design, page layout, color theory and typography. It is a bit too basic if you are a professional designer, but a perfect book for professionals that have to create presentations and want them to rock.
Professional graphic designers can still learn a lot from this book, however. Reynolds is a very good writer, and all designers can learn from how effortlessly and eloquently he explains complex ideas and principles to a wide and non-technical audience. Learning from his style of communication will help any designer who finds themselves in a pitch meeting and having to explain why their ideas will work.